CN104062784A - Panel detection circuit and display panel - Google Patents
Panel detection circuit and display panel Download PDFInfo
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- CN104062784A CN104062784A CN201410290475.9A CN201410290475A CN104062784A CN 104062784 A CN104062784 A CN 104062784A CN 201410290475 A CN201410290475 A CN 201410290475A CN 104062784 A CN104062784 A CN 104062784A
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/006—Electronic inspection or testing of displays and display drivers, e.g. of LED or LCD displays
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- G—PHYSICS
- G01—MEASURING; TESTING
- G01R—MEASURING ELECTRIC VARIABLES; MEASURING MAGNETIC VARIABLES
- G01R19/00—Arrangements for measuring currents or voltages or for indicating presence or sign thereof
- G01R19/28—Arrangements for measuring currents or voltages or for indicating presence or sign thereof adapted for measuring in circuits having distributed constants
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3674—Details of drivers for scan electrodes
- G09G3/3677—Details of drivers for scan electrodes suitable for active matrices only
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G3/00—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes
- G09G3/20—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters
- G09G3/34—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source
- G09G3/36—Control arrangements or circuits, of interest only in connection with visual indicators other than cathode-ray tubes for presentation of an assembly of a number of characters, e.g. a page, by composing the assembly by combination of individual elements arranged in a matrix no fixed position being assigned to or needed to be assigned to the individual characters or partial characters by control of light from an independent source using liquid crystals
- G09G3/3611—Control of matrices with row and column drivers
- G09G3/3685—Details of drivers for data electrodes
- G09G3/3688—Details of drivers for data electrodes suitable for active matrices only
-
- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2310/00—Command of the display device
- G09G2310/02—Addressing, scanning or driving the display screen or processing steps related thereto
- G09G2310/0264—Details of driving circuits
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- G—PHYSICS
- G09—EDUCATION; CRYPTOGRAPHY; DISPLAY; ADVERTISING; SEALS
- G09G—ARRANGEMENTS OR CIRCUITS FOR CONTROL OF INDICATING DEVICES USING STATIC MEANS TO PRESENT VARIABLE INFORMATION
- G09G2330/00—Aspects of power supply; Aspects of display protection and defect management
- G09G2330/12—Test circuits or failure detection circuits included in a display system, as permanent part thereof
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- Engineering & Computer Science (AREA)
- Physics & Mathematics (AREA)
- General Physics & Mathematics (AREA)
- Computer Hardware Design (AREA)
- Theoretical Computer Science (AREA)
- Chemical & Material Sciences (AREA)
- Crystallography & Structural Chemistry (AREA)
- Control Of Indicators Other Than Cathode Ray Tubes (AREA)
- Liquid Crystal (AREA)
- Devices For Indicating Variable Information By Combining Individual Elements (AREA)
Abstract
The invention discloses a panel detection circuit and a display panel. The panel detection circuit comprises a source electrode detection unit and a grid electrode detection unit, wherein the source electrode detection unit comprises a source electrode test line and a plurality of source electrode switch units; the grid electrode detection unit comprises a grid electrode control line, a grid electrode test line and a plurality of grid electrode switch units; the source electrode switch units and the grid electrode switch units respectively comprise at least two switch elements, so that the source electrode switch units and the grid electrode switch units are in a closed state after panel detection is finished.
Description
Technical field
The present invention relates to technical field of liquid crystal display, specifically, relate to a kind of panel detection circuit and display panel.
Background technology
Liquid crystal display panel of thin film transistor is the display device of current main flow.In order to ensure product quality, the one-tenth box stage in process of production need to be carried out unit testing (cell test) to the display unit of display panel inside.Fig. 1 is the structural representation of panel detection circuit in prior art.Panel detection circuit is arranged on the substrate 15 of display panel, comprises the some short-circuit rods (shorting bar) 13 that are arranged on gate driver circuit 11 and source electrode drive circuit 12 belows.Short-circuit rods 13 is for connecting sweep trace and data line, sends to the display unit 14 in display panel by coming from outside detection sweep signal and data detection signal.In the time detecting, detect sweep signal and data detection signal display unit 14 is lighted respectively, thereby whether detection display panel is normal.
After display panel is completed, need to use laser that the pin that is connected to short-circuit rods 13 of gate driver circuit 11 and source electrode drive circuit 12 belows is cut off, so that being can be used in, display panel shows normal picture.If realize the narrow frame design of display panel, also need by the mode of edging, short-circuit rods 13 to be ground off.
Therefore, in existing panel detection unit, need short-circuit rods 13 is set in process of production, and before dispatching from the factory, short-circuit rods 13 is cut off even and removed.This causes the production cost of display panel in prior art to increase, and production efficiency reduces.
Based on above-mentioned situation, need a kind of display panel detecting unit and display panel that production cost is reduced and production efficiency is improved badly.
Panel detection circuit of the prior art arranges source electrode control line and source electrode p-wire conventionally, utilizes source electrode control line to control source electrode switch element and opens, and makes source electrode test signal be sent to data line via source electrode switch element.Because the test signal of source electrode is forward bias, only adopt in the present embodiment a source electrode p-wire, open source electrode switch element by source electrode test signal, and make source electrode test signal be sent to data line via source electrode switch element.Thereby can reduce the space that the cabling in source electrode detecting unit 21 takies, be conducive to the narrow frame design of display pannel.
Grid detecting unit 22 comprises gate control lines 221, grid p-wire 222 and some gate switch unit.Wherein, gate switch unit is arranged on the opposite side of the gate driver circuit 11 of display panel 200, and gate control lines 221 and grid p-wire 222 extend to the opposite side of source electrode drive circuit 12 from the opposite side of the gate driver circuit 11 of display panel 200.
In the present embodiment, gate switch unit comprises triode T3 and T4.As shown in Figure 2, the grid of triode T3 is connected with gate control lines 221, and the source electrode of triode T3 is connected with grid p-wire 222.The grid of triode T4 is connected with gate control lines 221, and the source electrode of triode T4 is connected with the drain electrode of T3.The drain electrode of triode T4 is connected with the sweep trace of display panel.Thereby the first end of gate switch unit is connected with gate control lines, and the second end is connected with grid p-wire, and the 3rd end is connected with the sweep trace of display panel.
In the time carrying out the test of display panel, apply forward bias by grid p-wire 221, triode T3 and T4 in gate switch unit are opened, thereby by grid test signal input scan line.Wherein, grid test signal can be forward bias or negative bias.
In prior art, source electrode switch element and gate switch unit adopt single TFT switch conventionally.Once TFT switch failure leaks electricity, can cause display panel in the time of normal use, the data line signal (or scanning-line signal) being connected on same p-wire disturbs, and causes showing abnormal.
In the present embodiment, source electrode switch element and gate switch unit comprise respectively at least two triodes.Even if one of them triode leaks electricity, another one triode also can make source electrode switch element and gate switch unit in closure state.Therefore the panel detection circuit that, the present embodiment provides can reduce the risk of electric leakage.
It will be understood by those skilled in the art that in source electrode switch element and gate switch unit three triodes can be set that the even triode of greater number obtains the more excellent effect that prevents electric leakage.But the triode quantity of employing is more, the space that the cabling in source electrode detecting unit and grid detecting unit takies is larger, and this is also unfavorable for the narrow frame design of display panel.
In actual applications, after panel detection has operated, do not need the panel detection circuit in the present embodiment to remove from display panel 200, do not need cut step of the prior art by the connection of cutting off between data line, sweep trace and source electrode p-wire, gate control lines, grid p-wire yet.Thereby can simplify production stage, save the production time.
In addition, in order to ensure that source electrode switch element and gate switch unit are in closure state after panel detection completes, source electrode p-wire 211 is connected to the first electronegative potential driver element, and gate control lines 221 is connected to the second electronegative potential driver element.Wherein the first electronegative potential driver element and the second electronegative potential driver element provide negative voltage or direct ground connection, make in the time that display panel normally uses, source electrode p-wire 211 and gate control lines 221 are low-voltage, ensure that source electrode switch element and gate switch unit are in closure state.
In the present embodiment, as shown in Figure 2, source electrode p-wire 211 is connected to gate driver circuit 11, and gate control lines 221 is connected to source electrode drive circuit 12.Provide electronegative potential by gate driver circuit 11 and source electrode drive circuit 12.
Summary of the invention
For addressing the above problem, the invention provides a kind of panel detection circuit, comprise
Source electrode detecting unit, comprises source electrode p-wire and some source electrode switch elements, and one end of described source electrode switch element is connected with source electrode p-wire, and the other end is connected with the data line of display panel;
Grid detecting unit, comprises gate control lines, grid p-wire and some gate switch unit, and the first end of described gate switch unit is connected with gate control lines, and the second end is connected with grid p-wire, and the 3rd end is connected with the sweep trace of display panel;
Wherein, described source electrode switch element and gate switch unit comprise respectively at least two on-off elements, make after panel detection completes described source electrode switch element and gate switch unit in closure state.
In one embodiment of the invention, described source electrode switch element comprises the first on-off element and the second switch element that are connected in series, and described the first on-off element and second switch element are selected from triode and diode.
In one embodiment of the invention, described source electrode switch element comprises the first triode and the second triode, the grid of described the first triode is connected with described source electrode p-wire with source electrode, the grid of described the second triode is connected with the drain electrode of the first triode with source electrode, and the drain electrode of described the second triode is connected with the data line of display panel.
In one embodiment of the invention, described source electrode switch element comprises the first triode and diode, the grid of described the first triode is connected with described source electrode p-wire with source electrode, the drain electrode of described the first triode and the anodic bonding of diode, the negative electrode of described diode is connected with the data line of display panel.
In one embodiment of the invention, described source electrode switch element comprises two diodes that are connected in series.
In one embodiment of the invention, described gate switch unit comprises the 3rd triode and the 4th triode, the grid of described the 3rd triode is connected with gate control lines, the source electrode of described the 3rd triode is connected with grid p-wire, the grid of described the 4th triode is connected with gate control lines, the source electrode of described the 4th triode is connected with the drain electrode of the 3rd triode, and described the 4th drain electrode of triode and the sweep trace of display panel are connected.
In one embodiment of the invention, described source electrode p-wire is connected to the first electronegative potential driver element, to make source electrode switch element closure after panel test completes.
In one embodiment of the invention, described gate control lines is connected to the second electronegative potential driver element, to make gate switch unit closure after panel test completes.
In one embodiment of the invention, described triode is TFT thin film field-effect pipe or MOSFET pipe.
According to a further aspect in the invention, also provide a kind of display panel, comprising:
Above-mentioned panel detection circuit;
Staggered some sweep traces and data line;
The array of display cells being connected with sweep trace and data line;
Gate driver circuit, for providing scanning pulse signal to sweep trace;
Source electrode drive circuit, for providing data-signal to data line.
Compared with prior art, the present invention brings following beneficial effect: (1) by arranging at least two on-off elements in source electrode detecting unit and grid detecting unit, can ensure that display panel source electrode switch element and gate switch unit in the time of normal use are kept closed, prevent that the on-off element data line (or sweep trace) being connected on same p-wire causing that leaks electricity from interfering with each other; (2) in source electrode detecting unit, open source electrode switch element with a source electrode p-wire, and make source electrode test signal be sent to data line via source electrode switch element, thereby can reduce the space that the cabling in source electrode detecting unit takies, be conducive to the narrow frame design of display pannel; (3) after panel detection completes, do not need panel detection circuit to remove from display panel 200, do not need cut step of the prior art by the connection of cutting off between data line, sweep trace and source electrode p-wire, gate control lines, grid p-wire yet, thereby can simplify production stage, save the production time.
Other features and advantages of the present invention will be set forth in the following description, and, partly from instructions, become apparent, or understand by implementing the present invention.Object of the present invention and other advantages can be realized and be obtained by specifically noted structure in instructions, claims and accompanying drawing.
Brief description of the drawings
In order to be illustrated more clearly in the technical scheme of the embodiment of the present invention, will do simple introduction to needed accompanying drawing in embodiment below:
Fig. 1 is the schematic diagram of panel detection circuit in prior art;
Fig. 2 is the display panel structure schematic diagram according to the embodiment of the present invention one;
Fig. 3 a is according to the schematic diagram of a kind of source electrode switch element of the embodiment of the present invention two;
Fig. 3 b is according to the schematic diagram of the another kind of source electrode switch element of the embodiment of the present invention two;
Fig. 3 c is according to the schematic diagram of the another kind of source electrode switch element of the embodiment of the present invention two.
Embodiment
Describe embodiments of the present invention in detail below with reference to drawings and Examples, to the present invention, how application technology means solve technical matters whereby, and the implementation procedure of reaching technique effect can fully understand and implement according to this.It should be noted that, only otherwise form conflict, each feature in each embodiment and each embodiment in the present invention can mutually combine, and the technical scheme forming is all within protection scope of the present invention.In the accompanying drawings, the unit of structural similarity represents with identical label.
embodiment mono-
Fig. 2 is the structural representation of the display panel 200 that provides of the present embodiment.Display panel 200 comprises staggered some sweep traces and data line, the array of display cells being connected with sweep trace 17 and data line 18 (not shown in Fig. 2), gate driver circuit 11 and source electrode drive circuit 12.Wherein, gate driver circuit 11 is for providing scanning pulse signal to sweep trace, and source electrode drive circuit 12 is for providing data-signal to data line, thereby shows image in display unit.In display panel 200, be also provided with panel detection circuit, it comprises source electrode detecting unit 21 and grid detecting unit 22.
Display panel 200 can be liquid crystal display panel of thin film transistor (TFT-LCD), organic electroluminescence display panel (OLED) and macromolecular LED display panel (PLED) etc.
Source electrode detecting unit 21 is arranged on the opposite side of the source electrode drive circuit 12 of display panel 200, comprises source electrode p-wire 211 and some source electrode switch elements.In the present embodiment, source electrode switch element comprises triode T1 and T2.As shown in Figure 2, the grid of T1 is connected with source electrode p-wire 211 with source electrode, and the grid of T2 is connected with the drain electrode of T1 with source electrode, and the drain electrode of T2 is connected with the data line of display panel.Thereby one end of source electrode switch element is connected with source electrode p-wire 211, and the other end is connected with the data line of display panel.
In the time carrying out the test of display panel, apply forward bias by source electrode p-wire 211, triode T1 and T2 in source electrode switch element are opened, thereby by source electrode test signal input data line.
embodiment bis-
The present embodiment provides the numerous embodiments of source electrode switch element.Source electrode switch element shown in Fig. 3 a comprises triode T1 and diode D2.The grid of triode T1 and source electrode are connected to source electrode p-wire, and the drain electrode of T1 is connected to the anode of diode D2, and the negative electrode of diode D2 is connected with the data line of display panel.In the time carrying out the test of display panel, apply forward bias by source electrode p-wire 211, triode T1 and D2 in source electrode switch element are opened, thereby by source electrode test signal input data line.
Source electrode switch element shown in Fig. 3 b comprises triode T1 and diode D2.The anodic bonding of diode D2 is to source electrode p-wire, and the negative electrode of diode D2 is connected with grid and the source electrode of triode T1, and the drain electrode of T1 is connected to the data line that shows panel.In the time carrying out the test of display panel, apply forward bias by source electrode p-wire 211, diode D2 and triode T1 in source electrode switch element are opened, thereby by source electrode test signal input data line.
Source electrode switch element shown in Fig. 3 c comprises diode D1 and diode D2.The anodic bonding of diode D1 is to source electrode p-wire, and the negative electrode of diode D1 is connected to the anode of D2, and the negative electrode of diode D2 is connected with the data line of panel.In the time carrying out the test of display panel, apply forward bias by source electrode p-wire 211, diode D1 and D2 in source electrode switch element are opened, thereby by source electrode test signal input data line.
One of ordinary skill in the art will readily recognize that the triode using in the embodiment of the present invention can be TFT thin film field-effect pipe or MOSFET pipe, or other can substitute the element of use.
Although embodiment disclosed in this invention as above, the embodiment that described content just adopts for the ease of understanding the present invention, not in order to limit the present invention.Technician in any the technical field of the invention; do not departing under the prerequisite of spirit and scope disclosed in this invention; can do any amendment and variation what implement in form and in details; but scope of patent protection of the present invention, still must be as the criterion with the scope that appending claims was defined.
Claims (10)
1. a panel detection circuit, is characterized in that, comprising:
Source electrode detecting unit, comprises source electrode p-wire and some source electrode switch elements, and one end of described source electrode switch element is connected with source electrode p-wire, and the other end is connected with the data line of display panel;
Grid detecting unit, comprises gate control lines, grid p-wire and some gate switch unit, and the first end of described gate switch unit is connected with gate control lines, and the second end is connected with grid p-wire, and the 3rd end is connected with the sweep trace of display panel;
Wherein, described source electrode switch element and gate switch unit comprise respectively at least two on-off elements, make after panel detection completes described source electrode switch element and gate switch unit in closure state.
2. circuit as claimed in claim 1, is characterized in that, described source electrode switch element comprises the first on-off element and the second switch element that are connected in series, and described the first on-off element and second switch element are selected from triode and diode.
3. circuit as claimed in claim 2, it is characterized in that, described source electrode switch element comprises the first triode and the second triode, the grid of described the first triode is connected with described source electrode p-wire with source electrode, the grid of described the second triode is connected with the drain electrode of the first triode with source electrode, and the drain electrode of described the second triode is connected with the data line of display panel.
4. circuit as claimed in claim 2, it is characterized in that, described source electrode switch element comprises the first triode and diode, the grid of described the first triode is connected with described source electrode p-wire with source electrode, the drain electrode of described the first triode and the anodic bonding of diode, the negative electrode of described diode is connected with the data line of display panel.
5. circuit as claimed in claim 2, is characterized in that, described source electrode switch element comprises two diodes that are connected in series.
6. circuit as claimed in claim 2, it is characterized in that, described gate switch unit comprises the 3rd triode and the 4th triode, the grid of described the 3rd triode is connected with gate control lines, the source electrode of described the 3rd triode is connected with grid p-wire, the grid of described the 4th triode is connected with gate control lines, and the source electrode of described the 4th triode is connected with the drain electrode of the 3rd triode, and described the 4th drain electrode of triode and the sweep trace of display panel are connected.
7. the circuit as described in any one in claim 1 to 6, is characterized in that, described source electrode p-wire is connected to the first electronegative potential driver element, to make source electrode switch element closure after panel test completes.
8. the circuit as described in any one in claim 1 to 6, is characterized in that, described gate control lines is connected to the second electronegative potential driver element, to make gate switch unit closure after panel test completes.
9. the circuit as described in any one in claim 1 to 6, is characterized in that, described triode is TFT thin film field-effect pipe or MOSFET pipe.
10. a display panel, is characterized in that, comprising:
Panel detection circuit as claimed in any one of claims 1-9 wherein;
Staggered some sweep traces and data line;
The array of display cells being connected with sweep trace and data line;
Gate driver circuit, for providing scanning pulse signal to sweep trace;
Source electrode drive circuit, for providing data-signal to data line.
Priority Applications (3)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410290475.9A CN104062784B (en) | 2014-06-25 | 2014-06-25 | A kind of panel detection circuit and display panel |
| PCT/CN2014/082355 WO2015196522A1 (en) | 2014-06-25 | 2014-07-16 | Panel detection circuit and display panel |
| US14/416,771 US9741275B2 (en) | 2014-06-25 | 2014-07-16 | Panel detection circuit and display panel |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201410290475.9A CN104062784B (en) | 2014-06-25 | 2014-06-25 | A kind of panel detection circuit and display panel |
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| Publication Number | Publication Date |
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| CN104062784A true CN104062784A (en) | 2014-09-24 |
| CN104062784B CN104062784B (en) | 2017-06-30 |
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| CN201410290475.9A Active CN104062784B (en) | 2014-06-25 | 2014-06-25 | A kind of panel detection circuit and display panel |
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| Country | Link |
|---|---|
| US (1) | US9741275B2 (en) |
| CN (1) | CN104062784B (en) |
| WO (1) | WO2015196522A1 (en) |
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Also Published As
| Publication number | Publication date |
|---|---|
| US20160125775A1 (en) | 2016-05-05 |
| CN104062784B (en) | 2017-06-30 |
| US9741275B2 (en) | 2017-08-22 |
| WO2015196522A1 (en) | 2015-12-30 |
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